var field = item.up('form').down('multiselect'); if (checked) { field.delimiter = ','; Ext.Msg.alert('Delimiter Changed', 'The delimiter is now set to <b>","</b>. Click Save to ' + 'see that values are now submitted as a single parameter separated by the delimiter.'); } else { field.delimiter = null; Ext.Msg.alert('Delimiter Changed', 'The delimiter is now set to <b>null</b>. Click Save to ' + 'see that values are now submitted as separate parameters.'); } } }); [/code]